40584991 has 4 divisors (see below), whose sum is σ = 41528872. Its totient is φ = 39641112.

The previous prime is 40584961. The next prime is 40584997. The reversal of 40584991 is 19948504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40584991 - 2⁵ = 40584959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40584997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471876 + ... + 471961.

It is an arithmetic number, because the mean of its divisors is an integer number (10382218).

Almost surely, 2^40584991 is an apocalyptic number.

40584991 is a deficient number, since it is larger than the sum of its proper divisors (943881).

40584991 is an equidigital number, since it uses as much as digits as its factorization.

40584991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943880.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 40584991 is about 6370.6350546865. The cubic root of 40584991 is about 343.6543281521.

The spelling of 40584991 in words is "forty million, five hundred eighty-four thousand, nine hundred ninety-one".